[Experimental evidence for regenerative treatment of chronic tympanic membrane perforation].

Objective: The aim of our study was an experimental evaluation of tissue engineering approach to chronic tympanic membrane perforation closure.

Materials And Methods: Chronic tympanic membrane perforation models were created both sides in 12 chinchillas. Right sided perforations were divided into two equal groups (A and B) according to treatment; left sided perforations were used as a control group. Group A perforations were treated with collagen scaffold and fibroblast growth factor, group B perforations were treated with collagen scaffold only. During follow-up, we provided otovideoendoscopy for closure rates assessement every 2 weeks. In case of perforation closure, a morphological investigation of the regenerate was performed.

Results: Group A perforations were totally closed 2 weeks after treatment in all animals. In group B, complete closure of perforation was achieved after the third treatment procedure in one case. There were no spontaneous perforation closure in the control group. According to morphological investigation, the restoration of trilaminar structure was observed only in tissue engineering group tympanic membranes.